Types of Angles

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is the measurement range for acute angles?

Back

Acute angles measure between 0 and 90 degrees.

Front

What is the measurement range for obtuse angles?

Back

Obtuse angles measure between 90 and 180 degrees.

Front

What type of angle is 45 degrees?

Back

A 45 degree angle is an acute angle.

Front

What type of angle is 130 degrees?

Back

A 130 degree angle is an obtuse angle.

Front

Can an angle be both acute and obtuse?

Back

No, an angle cannot be both acute and obtuse; they are mutually exclusive.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.